Indexed on: 03 Apr '16Published on: 31 Mar '16Published in: Journal of Manufacturing Processes
For the first time, the corrosion behavior of Al/B4C/SiC hybrid composites fabricated by accumulative roll bonding (ARB) processes was investigated. The produced hybrid composites which were consisted of 1 and 2.5 wt.% of B4C and SiC reinforcement particles by nine ARB cycles showed a homogeneous distribution and strong bonding between particles and matrix without any porosity. In order to characterize the corrosion behavior of the produced hybrid composites, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization in 3.5 wt.% NaCl solution were carried out. Moreover, for the better understanding of corrosion resistance of the produced hybrid composites, the EIS and potentiodynamic polarization tests were carried out on ARBed 1050 Al alloy (which was used as matrix) after 3 and 9 cycles. The results of EIS and potentiodynamic polarization curves revealed that employing the ARB process has led to higher polarization resistance and lower corrosion current density of the produced hybrid composites as well as 1050 Al alloy.